What type of local anesthetic technique usually requires an aspirating syringe with a long 27 gauge needle?

The technique that typically requires an aspirating syringe fitted with a long 27 gauge needle is the nerve block of lower molars. This method is used to achieve adequate anesthesia in the mandibular region, particularly when working on the lower molars. The longer needle helps to reach deeper tissues, allowing for effective anesthetic diffusion around the inferior alveolar nerve, which innervates the lower teeth.

The aspiration feature of the syringe is crucial in this technique to ensure that the needle is not inadvertently placed within a blood vessel, reducing the risk of complications such as hematoma. The nerve block method is preferred for lower molars because it provides profound anesthesia and can numb multiple teeth in the quadrant, which is ideal for dental procedures requiring greater comfort and efficacy.